23 Jan, 2007
1 commit
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export profile_hits() on !SMP too.
Cc: Ingo Molnar
Cc: Avi Kivity
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
12 Jan, 2007
3 commits
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This adds the profile=kvm boot option, which enables KVM to profile VM
exits.Use: "readprofile -m ./System.map | sort -n" to see the resulting
output:[...]
18246 serial_out 148.3415
18945 native_flush_tlb 378.9000
23618 serial_in 212.7748
29279 __spin_unlock_irq 622.9574
43447 native_apic_write 2068.9048
52702 enable_8259A_irq 742.2817
54250 vgacon_scroll 89.3740
67394 ide_inb 6126.7273
79514 copy_page_range 98.1654
84868 do_wp_page 86.6000
140266 pit_read 783.6089
151436 ide_outb 25239.3333
152668 native_io_delay 21809.7143
174783 mask_and_ack_8259A 783.7803
362404 native_set_pte_at 36240.4000
1688747 total 0.5009Signed-off-by: Ingo Molnar
Acked-by: Avi Kivity
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Compiling the kernel with CONFIG_HOTPLUG = y and CONFIG_HOTPLUG_CPU = n
with CONFIG_RELOCATABLE = y generates the following modpost warningsWARNING: vmlinux - Section mismatch: reference to .init.data: from
.text between '_cpu_up' (at offset 0xc0141b7d) and 'cpu_up'
WARNING: vmlinux - Section mismatch: reference to .init.data: from
.text between '_cpu_up' (at offset 0xc0141b9c) and 'cpu_up'
WARNING: vmlinux - Section mismatch: reference to .init.text:__cpu_up
from .text between '_cpu_up' (at offset 0xc0141bd8) and 'cpu_up'
WARNING: vmlinux - Section mismatch: reference to .init.data: from
.text between '_cpu_up' (at offset 0xc0141c05) and 'cpu_up'
WARNING: vmlinux - Section mismatch: reference to .init.data: from
.text between '_cpu_up' (at offset 0xc0141c26) and 'cpu_up'
WARNING: vmlinux - Section mismatch: reference to .init.data: from
.text between '_cpu_up' (at offset 0xc0141c37) and 'cpu_up'This is because cpu_up, _cpu_up and __cpu_up (in some architectures) are
defined as __devinit
AND
__cpu_up calls some __cpuinit functions.Since __cpuinit would map to __init with this kind of a configuration,
we get a .text refering .init.data warning.This patch solves the problem by converting all of __cpu_up, _cpu_up
and cpu_up from __devinit to __cpuinit. The approach is justified since
the callers of cpu_up are either dependent on CONFIG_HOTPLUG_CPU or
are of __init type.Thus when CONFIG_HOTPLUG_CPU=y, all these cpu up functions would land up
in .text section, and when CONFIG_HOTPLUG_CPU=n, all these functions would
land up in .init section.Tested on a i386 SMP machine running linux-2.6.20-rc3-mm1.
Signed-off-by: Gautham R Shenoy
Cc: Vivek Goyal
Cc: Mikael Starvik
Cc: Ralf Baechle
Cc: Kyle McMartin
Cc: Paul Mackerras
Cc: Benjamin Herrenschmidt
Cc: "David S. Miller"
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Commit 5c1e176781f43bc902a51e5832f789756bff911b ("sched: force /sbin/init
off isolated cpus") sets init's cpus_allowed to a subset of cpu_online_map
at boot time, which means that tasks won't be scheduled on cpus that are
added to the system later.Make init's cpus_allowed a subset of cpu_possible_map instead. This should
still preserve the behavior that Nick's change intended.Thanks to Giuliano Pochini for reporting this and testing the fix:
http://ozlabs.org/pipermail/linuxppc-dev/2006-December/029397.html
Signed-off-by: Nathan Lynch
Acked-by: Ingo Molnar
Cc: Nick Piggin
Cc:
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
11 Jan, 2007
1 commit
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o noirqdebug_setup() is __init but it is being called by
quirk_intel_irqbalance() which if of type __devinit. If CONFIG_HOTPLUG=y,
quirk_intel_irqbalance() is put into text section and it is wrong to
call a function in __init section.o MODPOST flags this on i386 if CONFIG_RELOCATABLE=y
WARNING: vmlinux - Section mismatch: reference to .init.text:noirqdebug_setup from .text between 'quirk_intel_irqbalance' (at offset 0xc010969e) and 'i8237A_suspend'
o Make noirqdebug_setup() non-init.
Signed-off-by: Vivek Goyal
Signed-off-by: Andi Kleen
06 Jan, 2007
5 commits
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* master.kernel.org:/pub/scm/linux/kernel/git/gregkh/driver-2.6:
[PATCH] Driver core: Fix prefix driver links in /sys/module by bus-name -
Fix sched profiling typo, introduced by the sleep profiling patch. This
bug caused profile=sched to not work.Signed-off-by: Ingo Molnar
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
In the kernels later than 2.6.19 there is a regression that makes swsusp
fail if the resume device is not explicitly specified.It can be fixed by adding an additional parameter to
mm/swapfile.c:swap_type_of() allowing us to pass the (struct block_device
*) corresponding to the first available swap back to the caller.Signed-off-by: Rafael J. Wysocki
Acked-by: Pavel Machek
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
The parsing of some kernel parameters seem to enable irq's at a stage that
irq's are not supposed to be enabled (Particularly the ide kernel parameters).Having irq's enabled before the irq controller is initialized might lead to a
kernel panic. This patch only detects this behaviour and warns about wich
parameter caused it.[akpm@osdl.org: cleanups]
Signed-off-by: Ard van Breemen
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Modules may have drivers with the same name on different buses.
This patch fixes this problem.Signed-off-by: Kay Sievers
Signed-off-by: Greg Kroah-Hartman
01 Jan, 2007
1 commit
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Commit b2b2cbc4b2a2f389442549399a993a8306420baf introduced a user-
visible change: ->pdeath_signal is sent only when the entire thread
group exits.While this change is imho good, it may break things. So restore the
old behaviour for now.Signed-off-by: Oleg Nesterov
To: Albert Cahalan
Cc: Eric W. Biederman
Cc: Andrew Morton
Cc: Linus Torvalds
Cc: Ingo Molnar
Cc: Qi Yong
Cc: Roland McGrath
Signed-off-by: Linus Torvalds
31 Dec, 2006
5 commits
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kernel/lockdep.c: In function `lookup_chain_cache':
kernel/lockdep.c:1339: warning: long long unsigned int format, u64 arg (arg 2)
kernel/lockdep.c:1344: warning: long long unsigned int format, u64 arg (arg 2)Cc: Ingo Molnar
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
fs/proc/base.c:1869: warning: initialization discards qualifiers from pointer target type
fs/proc/base.c:2150: warning: initialization discards qualifiers from pointer target typeCc: Paul Jackson
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
mod_sysfs_setup() doesn't return error when kobject_add_dir() failed.
Signed-off-by: Akinobu Mita
Cc: Greg KH
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Remove the __resched_legal() check: it is conceptually broken. The biggest
problem it had is that it can mask buggy cond_resched() calls. A
cond_resched() call is only legal if we are not in an atomic context, with
two narrow exceptions:- if the system is booting
- a reacquire_kernel_lock() down() done while PREEMPT_ACTIVE is setBut __resched_legal() hid this and just silently returned whenever
these primitives were called from invalid contexts. (Same goes for
cond_resched_locked() and cond_resched_softirq()).Furthermore, the __legal_resched(0) call was buggy in that it caused
unnecessarily long softirq latencies via cond_resched_softirq(). (which is
only called from softirq-off sections, hence the code did nothing.)The fix is to resurrect the efficiency of the might_sleep checks and to
only allow the narrow exceptions.Signed-off-by: Ingo Molnar
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Fix suspend hang: rcutorture threads need to be nofreeze.
Signed-off-by: Ingo Molnar
Acked-by: Paul E. McKenney
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
24 Dec, 2006
1 commit
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Clark Williams reported that suspend doesnt work on his laptop on
2.6.20-rc1-rt kernels. The bug was introduced by the following cleanup
commit:commit 112cecb2cc0e7341db92281ba04b26c41bb8146d
Author: Siddha, Suresh B
Date: Wed Dec 6 20:34:31 2006 -0800[PATCH] suspend: don't change cpus_allowed for task initiating the suspend
because with this change 'error' is not initialized to 0 anymore, if
there are no other online CPUs. (i.e. if the system is single-CPU).the fix is the initialize it to 0. The really weird thing is that my
version of gcc does not warn about this non-initialized variable
situation ...(also fix the kernel printk in the error branch, it was missing a
newline)Reported-by: Clark Williams
Signed-off-by: Ingo Molnar
Signed-off-by: Linus Torvalds
23 Dec, 2006
11 commits
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* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6: (68 commits)
ACPI: replace kmalloc+memset with kzalloc
ACPI: Add support for acpi_load_table/acpi_unload_table_id
fbdev: update after backlight argument change
ACPI: video: Add dev argument for backlight_device_register
ACPI: Implement acpi_video_get_next_level()
ACPI: Kconfig - depend on PM rather than selecting it
ACPI: fix NULL check in drivers/acpi/osl.c
ACPI: make drivers/acpi/ec.c:ec_ecdt static
ACPI: prevent processor module from loading on failures
ACPI: fix single linked list manipulation
ACPI: ibm_acpi: allow clean removal
ACPI: fix git automerge failure
ACPI: ibm_acpi: respond to workqueue update
ACPI: dock: add uevent to indicate change in device status
ACPI: ec: Lindent once again
ACPI: ec: Change #define to enums there possible.
ACPI: ec: Style changes.
ACPI: ec: Acquire Global Lock under EC mutex.
ACPI: ec: Drop udelay() from poll mode. Loop by reading status field instead.
ACPI: ec: Rename gpe_bit to gpe
... -
This patch fixes the case when we reparent to a different thread in the
same thread group. This modifies the code so that we do not send
signals and do not change the signal to send to SIGCHLD unless we have
change the thread group of our parents. It also suppresses sending
pdeath_sig in this cas as well since the result of geppid doesn't
change.Thanks to Oleg for spotting my bug of only fixing this for non-ptraced
tasks.Signed-off-by: Eric W. Biederman
Cc: Mike Galbraith
Cc: Albert Cahalan
Cc: Andrew Morton
Cc: Roland McGrath
Cc: Ingo Molnar
Cc: Coywolf Qi Hunt
Acked-by: Oleg Nesterov
Signed-off-by: Linus Torvalds -
text data bss dec hex filename
before: 4036 44 0 4080 ff0 kernel/relay.o
after: 3727 44 0 3771 ebb kernel/relay.oCc: Mathieu Desnoyers
Cc: Tom Zanussi
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Christoph Hellwig has expressed concerns that the recent fdtable changes
expose the details of the RCU methodology used to release no-longer-used
fdtable structures to the rest of the kernel. The trivial patch below
addresses these concerns by introducing the appropriate free_fdtable()
calls, which simply wrap the release RCU usage. Since free_fdtable() is a
one-liner, it makes sense to promote it to an inline helper.Signed-off-by: Vadim Lobanov
Cc: Christoph Hellwig
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Kyle is hitting this warning, and we don't have a clue what it's caused by.
Add the obligatory dump_stack().Cc: kyle
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
kstrdup() returns NULL on error.
Cc: David Woodhouse
Signed-off-by: Akinobu Mita
Cc: Al Viro
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
The sanity check for no_irq_chip in __set_irq_hander() is unconditional on
both install and uninstall of an handler. This triggers false warnings and
replaces no_irq_chip by dummy_irq_chip in the uninstall case.Check only, when a real handler is installed.
Signed-off-by: Thomas Gleixner
Acked-by: Ingo Molnar
Acked-by: Sylvain Munaut
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
The structure cpu_isolated_map is used not only during initialization.
Multi-core scheduler configuration changes and exclusive cpusets
use this during run time. During setting of sched_mc_power_savings
policy, this structure is accessed to update sched_domains.Signed-off-by: Tim Chen
Acked-by: Suresh Siddha
Acked-by: Ingo Molnar
Cc:
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Signed-off-by: Adrian Bunk
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Fix kernel-doc warnings in 2.6.20-rc1.
Signed-off-by: Randy Dunlap
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Commit 2d7d253548cffdce80f4e03664686e9ccb1b0ed7 ("fix cond_resched() fix")
introduced an 'expected_preempt_count' parameter to __resched_legal() to
fix a bug where it was returning a false negative when called from
cond_resched_lock() and preemption was enabled.Unfortunately this broke things for when preemption is disabled.
preempt_count() will always return zero, thus failing the check against any
value of expected_preempt_count not equal to zero. cond_resched_lock() for
example, passes an expected_preempt_count value of 1.So fix the fix for the cond_resched() fix by skipping the check of
preempt_count() against expected_preempt_count when preemption is disabled.Credit should go to Sunil Mushran for spotting the bug during testing.
Signed-off-by: Mark Fasheh
Acked-by: Ingo Molnar
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
21 Dec, 2006
3 commits
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fix the schedule_on_each_cpu() implementation: __queue_work() is now
stricter, hence set the work-pending bit before passing in the new work.(found in the -rt tree, using Peter Zijlstra's files-lock scalability
patchset)Signed-off-by: Ingo Molnar
Signed-off-by: Linus Torvalds -
Problem:
sched_fork() has always called scheduler_tick() in some (unlikely)
circumstances in order to update the current task in light of those
circumstances. It has always been the case that the work done by
scheduler_tick() was more than was required to handle the problem in
hand but no harm was done except for the waste of a few CPU cycles.However, the splitting of scheduler_tick() into two procedures in
2.6.20-rc1 enables the wasted cycles to be saved as the new procedure
task_running_tick() does all the work that is required to rectify the
problem being handled.Solution:
Replace the call to scheduler_tick() in sched_fork() with a call to
task_running_tick().Signed-off-by: Peter Williams
Acked-by: Ingo Molnar
Signed-off-by: Linus Torvalds -
__set_irq_handler: Kill a bogus space
Signed-off-by: Geert Uytterhoeven
Signed-off-by: Linus Torvalds
20 Dec, 2006
1 commit
17 Dec, 2006
1 commit
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On architectures where the atomicity of the bit operations is handled by
external means (ie a separate spinlock to protect concurrent accesses),
just doing a direct assignment on the workqueue data field (as done by
commit 4594bf159f1962cec3b727954b7c598b07e2e737) can cause the
assignment to be lost due to lack of serialization with the bitops on
the same word.So we need to serialize the assignment with the locks on those
architectures (notably older ARM chips, PA-RISC and sparc32).So rather than using an "unsigned long", let's use "atomic_long_t",
which already has a safe assignment operation (atomic_long_set()) on
such architectures.This requires that the atomic operations use the same atomicity locks as
the bit operations do, but that is largely the case anyway. Sparc32
will probably need fixing.Architectures (including modern ARM with LL/SC) that implement sane
atomic operations for SMP won't see any of this matter.Cc: Russell King
Cc: David Howells
Cc: David Miller
Cc: Matthew Wilcox
Cc: Linux Arch Maintainers
Cc: Andrew Morton
Signed-off-by: Linus Torvalds
16 Dec, 2006
2 commits
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Conflicts:
kernel/power/disk.c
-
It has caused more problems than it ever really solved, and is
apparently not getting cleaned up and fixed. We can put it back when
it's stable and isn't likely to make warning or bug events worse.In the meantime, enable frame pointers for more readable stack traces.
Signed-off-by: Linus Torvalds
14 Dec, 2006
5 commits
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Deprecate the old "legacy" PM API, and more importantly default it to "n".
Virtually nothing in-tree uses it any more.Signed-off-by: David Brownell
Signed-off-by: Greg Kroah-Hartman -
Show the initialization state(live, coming, going) of the module:
$ cat /sys/module/usbcore/initstate
liveSigned-off-by: Kay Sievers
Signed-off-by: Greg Kroah-Hartman -
Virtually index, physically tagged cache architectures can get away
without cache flushing when forking. This patch adds a new cache
flushing function flush_cache_dup_mm(struct mm_struct *) which for the
moment I've implemented to do the same thing on all architectures
except on MIPS where it's a no-op.Signed-off-by: Ralf Baechle
Signed-off-by: Linus Torvalds -
calc_load() is called by timer interrupt to update avenrun[]. It currently
calls nr_active() at each timer tick (HZ per second), while the update of
avenrun[] is done only once every 5 seconds. (LOAD_FREQ=5 Hz)nr_active() is quite expensive on SMP machines, since it has to sum up
nr_running and nr_uninterruptible of all online CPUS, bringing foreign
dirty cache lines.This patch is an optimization of calc_load() so that nr_active() is called
only if we need it.The use of unlikely() is welcome since the condition is true only once every
5*HZ time.Signed-off-by: Eric Dumazet
Cc: Ingo Molnar
Acked-by: "Siddha, Suresh B"
Cc: Nick Piggin
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
All kcalloc() calls of the form "kcalloc(1,...)" are converted to the
equivalent kzalloc() calls, and a few kcalloc() calls with the incorrect
ordering of the first two arguments are fixed.Signed-off-by: Robert P. J. Day
Cc: Jeff Garzik
Cc: Alan Cox
Cc: Dominik Brodowski
Cc: Adam Belay
Cc: James Bottomley
Cc: Greg KH
Cc: Mark Fasheh
Cc: Trond Myklebust
Cc: Neil Brown
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
